Tricks
In this section, I would suggest just a bunch of tips and tricks that I found useful in the past.
Bare repositories
Bare repositories are repositories that do not contain working copy files but contain only the .git folder. A bare repository is essentially for sharing; if you use Git in a centralized way, pushing and pulling to a common remote (a local server, a GitHub repository, or so on), you will agree that the remote has no interest in checking out files you work on; the scope of that remote is only to be a central point of contact for the team, so having working copy files in it is a waste of space, and no one will edit them directly on the remote.
If you want to set up a bare repository, you have to use only the --bare option:
$ git init --bare NewRepository.git
As you may have noticed, I called it NewRepository.git, using a .git extension; this is not mandatory but is a common way to identify bare repositories. If you pay attention, you will note that even in GitHub every repository...
